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Table 3 ICC for test-retest study

From: Validity and reliability of the Portuguese version of the modified Migraine Disability Assessment

Because of headaches, during last month, Test (n = 92) Retest (n = 30) Correlation
Mean Median Mean Median ICC with MIDAS-P
[1] # missed days of work or school 2.07 0.0 1.60 0.0 0.9972 0.6971
[2] # days with productivity reduced by half or more 7.90 5.0 8.50 4.5 0.9572 0.8281
[3] # missed days of household work 5.64 2.0 9.03 3.0 0.9812 0.7491
[4] # days with household work productivity reduced by half or more 9.47 5.5 9.60 6.0 0.9502 0.8531
[5] # missed days of family, social or leisure activities 3.54 2.0 2.53 1.0 0.8912 0.5641
MIDAS- P index 28.5 16.0 29.2 20.0 0.9032  
[6] # days with headache 9.78 6.0 10.5 10.0 0.8322  
[7] In a 0–10 scale, on average, how painful were these headaches 7.49 8.0 8.07 8.0 0.7802  
  1. 1 p < 0.01 2 p < 0.001